Loud screech noise, no idea, with video/audio

jonzo22

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My Sunfire makes this horrible noise at random times when its running. Its really embarrassing to be driving it down the street when this noise comes on :( I really need some help. The mechanic couldn't tell what it is, maybe someone here can? It comes from the alternator area and sounds like some using a grinder to cut some metal. I took a video and caught it and walked around the car so you can see / hear how bad it is. Please check out the video and tell me what you think this noise is! In the video the sound doesn't work for the first 5-10 seconds so do not turn it up because it comes on very loud, and then cuts out, then comes back on and stays for the rest of the video. Please help! I just need to know what needs to get fixed. :eek:

www.youtube.com/watch?v=eNsgjKgN4To

to watch copy that link and take the space out of you|tube and paste that in the address bar, thanks for any help!
 
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a bad bearing, take a small diameter rubber hose hold one end near your ear and move it around the alternator and the belt tensioner to isolate the source of the noise.
 
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